swift - phasset如何获取视频url？

Question

显示相机胶卷中的所有视频并在 UICollectionView 中显示它们。

phasset如何获取视频url？

    var videos: PHFetchResult<PHAsset>!

    fileprivate func fetchVideos() {
        print("fetch Videos")
        let fetchOptions = PHFetchOptions()
        fetchOptions.sortDescriptors = [ NSSortDescriptor(key: "creationDate", ascending: false) ]
        fetchOptions.predicate = NSPredicate(format: "mediaType = %d", PHAssetMediaType.video.rawValue)
        videos = PHAsset.fetchAssets(with: fetchOptions)
        print(videos)
        collectionView?.reloadData()
    }

    override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        print(indexPath.row)

        let asset = videos!.object(at: indexPath.row)
                   ???

    }

CollectionViewCellHeader;

let fileUrl = ""

override init(frame: CGRect) {
    super.init(frame: frame)

    let videoURL = "https://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"

    let fileUrl = NSURL(string: videoURL) as! URL


    var aPlayer = AVPlayer(url: fileUrl)
    let moviePlayerController = AVPlayerViewController()

    moviePlayerController.player = aPlayer
    moviePlayerController.view.frame = CGRect(x:0, y:0, width:frame.size.width, height:frame.height)
    moviePlayerController.videoGravity = AVLayerVideoGravity.resizeAspectFill.rawValue
    moviePlayerController.view.sizeToFit()
    moviePlayerController.showsPlaybackControls = false
    moviePlayerController.player?.play()
    addSubview(moviePlayerController.view)

}

如何获取选定的视频网址？如何使用 requestPlayerItem() 方法？

Answer 1

How do I get the selected video URL

你不知道。你不需要它。 PHImageManager 以各种形式直接从 PHAsset 给你视频，这取决于你想用它做什么。

例如，如果您的目标是播放视频，请调用此方法:

https://developer.apple.com/documentation/photos/phimagemanager/1616958-requestplayeritem